Stochastic resonance of a flexible chain crossing over a barrier
Asian Pacific Center for Theoretical Physics - Pohang 790-784, South Korea
2 Department of Physics and PCTP, Pohang, University of Science and Technology - Pohang 790-784, South Korea
Accepted: 28 April 2010
We study the stochastic resonance (SR) of a flexible polymer surmounting a bistable-potential barrier. Due to the flexibility that can enhance crossing rate and change chain conformations at the barrier, the SR behaviors manifest many features of the bona fide entropic SR, such as the power amplification peaks at optimal chain lengths and elastic constants as well as the optimal noise strengths. The pronounced peaks that emerge depending on the chain lengths and conformation states suggest novel means of manipulating biopolymers, such as efficient separation methods using undulating channels.
PACS: 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 87.15.H- – Dynamics of biomolecules / 82.20.Db – Transition state theory and statistical theories of rate constants
© EPLA, 2010